Search

CN-115698871-B - Method for forming three-dimensional object on dial

CN115698871BCN 115698871 BCN115698871 BCN 115698871BCN-115698871-B

Abstract

The invention relates to a deposition method (500) for forming a three-dimensional object (220) on a dial and/or bezel. The deposition method (500) comprises at least the steps of providing (510) at least one support (210) and depositing (520) an adhesion layer (120). -defining (530) a contour (229) of the object (220) so as to be able to form (540) a cavity (225) by depositing a plurality of polymer layers (130) such that the object (220) is formed by filling (550) the cavity (225) with at least one finish layer (140) deposited (520).

Inventors

  • F. Jean-Leno
  • P. Fritz

Assignees

  • 鲁巴特和韦尔曼股份有限公司

Dates

Publication Date
20260512
Application Date
20210615
Priority Date
20200617

Claims (11)

  1. 1. A deposition method (500) for forming an object (220) for a wristwatch, the object (220) comprising a perimeter, at least one first surface (221) and/or a volume, the deposition method (500) comprising the steps of: -providing (510) at least one support (210) comprising at least one receiving surface (211); -depositing (520) an adhesion layer (120) on said at least one receiving surface (211), said adhesion layer being formed of one or more layers made of at least one material selected from Au, cu, ag, in, pt, pd, ni, ti, ta, cr, th or an alloy of these materials, to render said at least one receiving surface (211) electrically conductive; -defining (530) a contour (229) on the deposited adhesion layer (120), the contour (229) corresponding to the perimeter, the at least one first surface (221) and/or the volume of the object (220); -forming (540) a cavity (225) along the contour (229) by depositing a plurality of polymer layers (130) on the adhesion layer (120) such that the portion of the adhesion layer (120) corresponding to the perimeter, the at least one first surface (221) and/or the volume of the object (220) is opposite and not covered by the polymer layers (130); -filling (550) the cavity (225) by depositing (520) at least one finishing layer (140) on the opposite portion of the adhesion layer (120), the finishing layer (140) comprising at least one material selected from Au, cu, ag, in, pt, pd, ni, ti, ta, cr, th or an alloy of these materials, and -Surface treating (560) the plurality of polymer layers (130) and the deposited adhesion layer (120) to expose the at least one receiving surface (211) of the support (210), Wherein the deposition of the plurality of polymer layers (130) is produced by additive manufacturing.
  2. 2. The deposition method (500) according to claim 1, wherein the object (220) comprises at least one second surface (222), the at least one second surface (222) being more curved than the at least one first surface (221).
  3. 3. The deposition method (500) according to claim 1 or 2, wherein the chamber (225) is formed along a midline (223) of the object (220) and/or the contour (229) is formed along the midline (223) of the object (220).
  4. 4. A deposition method (500) according to claim 3, wherein the midline (223) forms an angle with the at least one receiving surface (211).
  5. 5. The deposition method (500) of claim 1 or 2, wherein the object (220) forms an undercut (224) in the plurality of polymer layers (130) or the object (220) comprises an undercut (224).
  6. 6. The deposition method (500) according to claim 1 or 2, wherein the at least one finishing layer (140) comprises at least one material selected from Au, pt, ag, cr, pd or an alloy of these materials.
  7. 7. The deposition method (500) according to claim 1 or 2, wherein the surface treatment (560) is performed by pickling and/or stripping.
  8. 8. The deposition method (500) according to claim 1 or 2, wherein the support (210) is made of ceramic.
  9. 9. The deposition method (500) according to claim 1 or 2, wherein the deposition (520) of the adhesion layer (120) is performed in contact with the at least one receiving surface (211).
  10. 10. A wristwatch comprising at least one support (210) and an object (220) produced according to the deposition method (500) of any one of claims 1 to 9.
  11. 11. The watch according to claim 10, wherein said at least one support (210) is a dial or bezel.

Description

Method for forming three-dimensional object on dial Technical Field The present invention relates to a method for forming an object. More particularly, the present invention relates to a method for depositing layers to form a three-dimensional object for the dial of a wristwatch. Background There are a number of techniques in the art for creating patterns on a substrate. However, these techniques do not allow for the creation of objects that include undercuts. More specifically, current methods use a directed beam of light to create a pattern, the cross-section of which, i.e., the cross-section of the pattern, is rectangular or polygonal in type, such as trapezoidal or diamond. More complex shapes are not currently achievable using these current methods, e.g., circular contours or curved surfaces cannot be created. Disclosure of Invention The invention proposes to overcome these drawbacks, in whole or in part, by providing a deposition method for forming an object, preferably for a wristwatch, comprising a perimeter, at least one first surface and/or volume, comprising at least one of the following steps: -providing at least one support comprising at least one receiving surface; -depositing an adhesion layer on the at least one receiving surface; -defining a contour on the deposited adhesion layer, the contour corresponding to the perimeter, the at least one first surface and/or the volume of the object; -forming a cavity along said contour by depositing a plurality of polymer layers on said adhesion layer such that a portion of said adhesion layer corresponding to said perimeter, said at least one first surface and/or said volume of said object is opposed, preferably free; -filling the cavity by depositing at least one finishing layer (couche de finition) on the opposite, preferably free, portion of the adhesion layer, and -Surface treating the plurality of polymer layers and the deposited adhesion layer so as to expose the at least one receiving surface of the support. Due to this assumption, objects having complex shapes such as circular contours or curved surfaces can be created. According to one embodiment, the object comprises at least one second surface that is more curved than the at least one first surface. Due to this assumption, an object having a complex shape such as a curved surface can be created. According to one embodiment, the chamber is formed along a midline of the object and/or the profile is formed along a midline of the object. According to one embodiment, the midline forms an angle with the at least one receiving surface. According to one embodiment, the object forms an undercut (contre-d pouille) in the plurality of polymer layers or the object comprises an undercut (224). Due to any of the above assumptions, an object of complex shape with undercut can be created. According to one embodiment, the chamber is formed by additive manufacturing. Due to any of the above assumptions, an object of complex shape with undercut can be created. According to one embodiment, the adhesion layer comprises at least one material selected from Au, cu, ag, in, pt, pd, ni, ti, ta, cr, th or an alloy of these materials. According to one embodiment, the at least one finishing layer comprises at least one material selected from these materials or alloys of these materials. Due to these materials, complex shapes can be created by additive manufacturing. According to one embodiment, the surface treatment is performed by pickling and/or stripping (stripage). With this assumption, the at least one receiving surface of the support has a better visual appearance. According to one embodiment, the support is made of ceramic. According to one embodiment, said depositing of said attachment layer is performed in contact with said at least one receiving surface. Due to this assumption, the at least one receiving surface is made electrically conductive. The invention relates to a watch comprising at least one support and an object produced according to said deposition method of the invention. According to one embodiment, the at least one support is a dial or bezel. Drawings The invention will be described in more detail hereinafter using the accompanying drawings, given by way of example and not by way of limitation, in which: FIG. 1 illustrates a deposition method 500 according to the present invention; Fig. 2 and 3 illustrate examples of objects having an undercut 224 and/or a curved surface; fig. 4 shows an example of a watch dial produced according to the deposition method 500. Detailed Description Fig. 2 and 3 show different objects, called complex objects, due to their geometry. More specifically, these objects have at least one curved surface and have undercuts 224, which makes it difficult to replicate these shapes on an industrial scale. More specifically, most current methods use a directed beam of light to create a pattern having a rectangular cross-section. However, the curved surface creates an appearance